Section 5.2- Gas Pressure

Question 1

since gas molecules are in constant, rapid motion, they have

Answer 1

kinetic energy

Question 2

equation for kinetic energy

Answer 2

KE= 1/2 mv^2

Question 3

the collisions of the gas molecules with the container walls constitute __________, defined as a force (push) per unit area

Answer 3

pressure

Question 4

pressure equation

Answer 4

P=F/A

Question 5

more important in the KE equation

Answer 5

velocity because it is squared

Question 6

the SI unit for pressure

Answer 6

pascal (Pa)

Question 7

the more velocity an object has, the greater the _____________ and _____________

Answer 7

kinetic energy
temperature

Question 8

directly related to kinetic energy

Answer 8

pressure

Question 9

1 Pa is a _________ per square meter

Answer 9

newton (SI unit of force)

Question 10

the pressure exerted by the collisions of gas molecules in our atmosphere with the earth may be measured by a

Answer 10

barometer

Question 11

invented the mercury barometer

Answer 11

Evangelista Torricelli

Question 12

a more compact and rugged type of barometer that senses pressure using a flexible, airtight metal box

Answer 12

aneroid barometer

Question 13

pressures in __________________ are convenient because they can be directly measured using mercury barometers and other similar devices

Answer 13

millimeters of mercury

Question 14

is equal to 1 mmHg but is precisely defined in terms of the pascal

Answer 14

torr

Question 15

is average air pressure at sea level
equal to 760 torr

Answer 15

standard atmosphere

Question 16

another term denoting 1 atm or 760 torr is

Answer 16

standard pressure

Question 17

another unit used for atmospheric pressure (especially in meteorology) is the __________, equal to 10^5 Pa

Answer 17

bar

Question 18

a common laboratory device used to measure the pressures of gas samples is the

Answer 18

manometer

Question 19

the two types of manometers

Answer 19

open-end manometer (one end open to atmosphere)
closed-end manometer (has a vacuum; not depend on atmospheric pressure)

Question 20

small gas pressures can be measured more accurately by using the

Answer 20

closed-end manometer